Repulsive gravity at the quantum scale would have flattened out inhomogeneities in the early universe First light The cosmic microwave background, as imaged by the European Space Agency’s Planck ...

Astronomers have found a vast loop-like structure, 20 light years across, adjacent to the most massive star-forming region known in our galaxy. The loop, which was observed in X-ray wavelengths, is 15 ...

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A glowing loop of X-rays as wide as 20 light years across has been found near the centre of the Milky Way. It may represent a new source of mysterious charged particles called cosmic rays, say ...